FRICTION FILM

Abstract

A friction film for increasing friction between two workpieces includes a deformable carrier material having a porous structure and friction-increasing particles on at least one side of the carrier material. The carrier material may be a polyethylene film or a liquifiable adhesive, and the friction-increasing particles may be titanium boride particles and/or diamond particles.

Claims

1. A friction film for increasing friction between two workpieces, wherein the friction film includes a deformable carrier material having a porous structure and friction-increasing particles on at least one side.

2. The friction film according to claim 1, wherein the carrier material is a polymer film.

3. The friction film according to claim 1, wherein the porous structure has a sponge structure or fiber structure.

4. The friction film according to claim 1, wherein the carrier material is a liquifiable adhesive.

5. The friction film according to claim 4, wherein the friction-increasing particles are connected to one another by the adhesive.

6. The friction film according to claim 1, wherein the carrier material is coated with an adhesive on both sides, and wherein the friction-increasing particles are applied to only one side of the carrier material.

7. The friction film according to claim 1, wherein the carrier material is coated with an adhesive on both sides, and wherein the friction-increasing particles are applied on both sides of the carrier material.

8. The friction film according to claim 1, wherein the friction-increasing particles are introduced into the carrier material.

9. The friction film according to claim 1, wherein the carrier material has a thickness of 20 μm to 100 μm.

10. The friction film according to claim 1, wherein the carrier material has a thickness of 10 μm to 100 μm.

11. The friction film according to claim 10, wherein the friction-increasing particles are applied to only one side of the carrier material.

12. The friction film according to claim 1, wherein the friction-increasing particles include titanium boride particles and/or diamond particles.

13. The friction film according to claim 1, wherein in addition to the friction-increasing particles zinc particles are applied to the carrier material as spacer particles.

14. The friction film according to claim 1, wherein the friction-increasing particles are attached to the carrier material by an adhesive.

15. The friction film according to claim 14, wherein the carrier material is a polyethylene film.

16. The friction film according claim 1, wherein the carrier material has a thickness of 25 μm to 50 μm.

17. The friction film according claim 1, wherein the carrier material has a thickness of 15 μm to 50 μm.

18. The friction film according to claim 1, including zinc spacer particles on the carrier material, wherein the carrier material is a polyethylene film, wherein the carrier material has a fibrous or sponge-like structure, wherein the carrier material is coated with adhesive on both sides, wherein the carrier material has a thickness of 25 μm to 50 μm, and wherein the friction-increasing particles include titanium boride particles and/or diamond particles.

19. A system comprising a first workpiece; a second workpiece; and the fiction film according to claim 1 between the first workpiece and the second workpiece, wherein the first workpiece is connected to the second workpiece in a manner that presses the friction-increasing particles into a surface of the first workpiece and into a surface of the second workpiece.

20. A system comprising a first workpiece; a second workpiece; and the fiction film according to claim 4 between the first workpiece and the second workpiece, wherein the first workpiece is connected to the second workpiece in a manner that presses the friction-increasing particles into a surface of the first workpiece and into a surface of the second workpiece.

Description

[0027] In the following the invention is described in more detail using the exemplary embodiments depicted in the drawings. Here the exemplary embodiments and the combinations shown in the exemplary embodiments are purely exemplary and are not intended to define the scope of the invention. This scope is defined solely by the pending claims.

[0028] FIG. 1 shows a friction film according to an embodiment of the invention; and

[0029] FIG. 2 shows the friction film of FIG. 1 disposed between two workpieces.

[0030] In the following, identical or functionally equivalent elements are designated by the same reference numbers.

[0031] FIG. 1 shows a friction film 1 for increasing the friction of a workpiece. The friction film 1 includes a carrier material 2. The carrier material 2 can be, for example, a film that is coated with an adhesive. In one not-depicted embodiment, the carrier material can be an adhesive that serves only as carrier for the assembling, and liquefies in operation. The following description relates to the design as a film, but can be used analogously with respect to the design as pure adhesive.

[0032] The film can be, for example, a polymer film on which an adhesive is applied on both sides. As is shown in FIG. 1, the carrier material 2 is coated only on one side with friction-increasing particles 4. Alternatively (not shown), the carrier material 2 can also be coated on both sides with friction-increasing particles 4. If the carrier material 2 is only coated on one side, the other side can be adhesive. In this way the friction film 1 can be applied to a workpiece in a simple manner, since it can be adhered to the workpiece by the adhesive side. The friction film 1 can easily be adapted to the shape of the workpiece by it being trimmed, for example, manually on site, without additional (punching) tools. Furthermore, the friction film 1 is deformable (without a crumbling of the particles 4), and can therefore also be adapted to curves or the like of the workpiece.

[0033] The friction-increasing particles 4 serve to increase the friction of the workpiece, and can be, for example, titanium diboride particles or diamond particles. In addition to the friction-increasing particles 4, still further particles 6 can be applied to the carrier material 2, such as, for example, spacer particles. Due to the spacer particles 6, it can be ensured that the friction-increasing particles 4 can only embed into a workpiece by up to a predefined degree, as is described in connection with FIG. 2.

[0034] The friction-increasing particles 4 and the spacer particles 6 adhere to the carrier material 2 due to the adhesive properties of the carrier material 2. For example, the friction-increasing particles 4 and the spacer particles 6 can be sprinkled onto the carrier material 2 in powder form or as bulk material, wherein excess particles fall off. In this way a uniform and one-layer coating including friction-increasing particles 4 and spacer particles 6 is created.

[0035] If the friction film 1 is now inserted between two workpieces 8, as is shown in FIG. 2, the friction-increasing particles 4 press into the surfaces of the workpieces 8. Here the friction-increasing particles 4 press on the one hand through the film, and on the other hand the friction-increasing particles 4 interlock with the surfaces of the workpieces 8.

[0036] If the friction film 1 is removed again, the friction-increasing particles 4 are thus also removed, since they do not adhere to the workpieces 8, but rather only an interlocking takes place to increase the friction. As can be seen in FIG. 2, the friction-increasing particles 4 press only as far into the surfaces of the workpieces 8 as the spacer particles 6 allow. The spacer particles 6, for example zinc particles, can deform somewhat under pressure without penetrating into the surface of the carrier material 2. As soon as the flat-pressed surfaces of the spacer particles 6 have achieved a total surface area by which the load in N/mm2 no longer allows flowing, they serve as stable spacers.

[0037] Due to the friction film described here, it is thus possible in a simple manner to increase the friction between two workpieces. Since the friction-increasing particles are present in film form, these can easily be applied to a workpiece and be adapted to the shape and size of the workpiece on site.

REFERENCE NUMBER LIST

[0038] 1 Friction film [0039] 2 Carrier material [0040] 4 Friction-increasing particles [0041] 6 Spacer particles [0042] 8 Workpiece